کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5162533 1502296 2013 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Atmospheric sources and soil filtering of PAH content in karst seepage waters
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Atmospheric sources and soil filtering of PAH content in karst seepage waters
چکیده انگلیسی
The analysis of PAHs (polycyclic aromatic hydrocarbons) in karst environments has provided an assessment of the vulnerability of karst water and the study of PAH records in stalagmites. The major source of PAHs has generally been considered to be the soil. In this study, we report the quantification of PAHs in the ecosystem compartments of a mountain karst system over a snow-melting period and the spring to summer dry period. PAH profiles in karst seepage waters were consistently similar to those in wet deposits, following the change in PAH profiles between winter and summer periods. However, PAH signatures of atmospheric wet deposits were modulated by a loss of the high molecular weight PAHs, which appear to accumulate in soils. A PAH mass balance was calculated during a summer storm event. This mass balance suggests that dry deposits and canopy throughfall could account for the PAH abundance in karst seepage waters. This study demonstrates the ability of organic hydrophobic compounds to be directly transferred from the atmosphere or canopy into seepage waters, giving new emphasis to the study of PAHs recorded in stalagmites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Organic Geochemistry - Volume 65, December 2013, Pages 37-45
نویسندگان
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